Terry Etim (15-4 MMA, 6-4 UFC) has suffered an injury that will force him out of his main-card bout against Joe Lauzon (21-7 MMA, 8-2 UFC) at UFC on FOX 4. FUEL TV’s “UFC Tonight” announced news of the undisclosed injury on Tuesday night’s program. Lauzon is expected to remain on the card against a new opponent

UFC on FOX 4 takes place Aug. 4 at Staples Center in Los Angeles. The main card airs on FOX and features a main event light heavyweight bout between former champion Mauricio “Shogun” Rua and Brandon Vera.

Etim last fought in January at UFC 142, where he suffered a head-kick knockout loss to Edson Barboza, a certain “Knockout of the Year” candidate. Etim did get a “Fight of the Night” bonus award, however – his fourth bonus in his past five fights. Injury setbacks had the Brit fighting just once each in 2010 and 2011. Now he’ll have to wait a little longer for a second fight in 2012.

Lauzon also is looking to rebound from a highlight-reel knockout loss. Anthony Pettis caught him with a head kick at UFC 144 in February. Before that, Lauzon was on a 4-2 run with four “Submission of the Night” wins and a pair of “Fight of the Night” checks in his two losses to George Sotiropoulos and Sam Stout.

UFC on FOX 4 was hit with a major injury change when original headliner Brian Stann was forced out of a fight with former Bellator middleweight champion Hector Lombard. Lombard was moved to UFC 149, where he’ll fight Tim Boetsch thanks to Michael Bisping’s injury. Rua, needing a new fight at UFC 149 when Thiago Silva dropped out, was moved to the FOX card against Vera.

As the UFC 189 tour made its last stop in Dublin, featherweight champ Jose Aldo was met with a torrent of abuse from the Irish fans. It might have been unpleasant, but it might also have been just what he needed.